X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/45e6e6f8ab806b337dffeb3b52fec7eba3c845ef..58bd3862b82749175bd04809607d82f1b22f0300:/samples/image/image.cpp?ds=inline diff --git a/samples/image/image.cpp b/samples/image/image.cpp index 99c3ab73eb..01af647f11 100644 --- a/samples/image/image.cpp +++ b/samples/image/image.cpp @@ -26,6 +26,7 @@ #include "wx/mstream.h" #include "wx/wfstream.h" #include "wx/quantize.h" +#include "wx/stopwatch.h" #if wxUSE_CLIPBOARD #include "wx/dataobj.h" @@ -118,6 +119,9 @@ public: void OnAbout( wxCommandEvent &event ); void OnNewFrame( wxCommandEvent &event ); + void OnImageInfo( wxCommandEvent &event ); + void OnThumbnail( wxCommandEvent &event ); + #ifdef wxHAVE_RAW_BITMAP void OnTestRawBitmap( wxCommandEvent &event ); #endif // wxHAVE_RAW_BITMAP @@ -131,20 +135,60 @@ public: MyCanvas *m_canvas; private: + // ask user for the file name and try to load an image from it + // + // return the file path on success, empty string if we failed to load the + // image or were cancelled by user + static wxString LoadUserImage(wxImage& image); + + DECLARE_DYNAMIC_CLASS(MyFrame) DECLARE_EVENT_TABLE() }; +// ---------------------------------------------------------------------------- +// Frame used for showing a standalone image +// ---------------------------------------------------------------------------- + +enum +{ + ID_ROTATE_LEFT = wxID_HIGHEST+1, + ID_ROTATE_RIGHT, + ID_RESIZE, + ID_PAINT_BG +}; + class MyImageFrame : public wxFrame { public: - MyImageFrame(wxFrame *parent, const wxBitmap& bitmap) - : wxFrame(parent, wxID_ANY, _T("Double click to save"), + MyImageFrame(wxFrame *parent, const wxString& desc, const wxBitmap& bitmap) + : wxFrame(parent, wxID_ANY, + wxString::Format(_T("Image from %s"), desc.c_str()), wxDefaultPosition, wxDefaultSize, - wxCAPTION | wxSYSTEM_MENU | wxCLOSE_BOX), + wxDEFAULT_FRAME_STYLE | wxFULL_REPAINT_ON_RESIZE), m_bitmap(bitmap) { + wxMenu *menu = new wxMenu; + menu->Append(wxID_SAVE); + menu->AppendSeparator(); + m_pClearBgMenu = menu->AppendCheckItem(ID_PAINT_BG, _T("&Paint background")); + menu->AppendSeparator(); + menu->Append(ID_RESIZE, _T("&Fit to window\tCtrl-F")); + menu->AppendSeparator(); + menu->Append(ID_ROTATE_LEFT, _T("Rotate &left\tCtrl-L")); + menu->Append(ID_ROTATE_RIGHT, _T("Rotate &right\tCtrl-R")); + + wxMenuBar *mbar = new wxMenuBar; + mbar->Append(menu, _T("&Image")); + SetMenuBar(mbar); + + CreateStatusBar(); + SetClientSize(bitmap.GetWidth(), bitmap.GetHeight()); + + UpdateStatusBar(); + +// SetBackgroundColour(*wxWHITE); } void OnEraseBackground(wxEraseEvent& WXUNUSED(event)) @@ -154,11 +198,19 @@ public: void OnPaint(wxPaintEvent& WXUNUSED(event)) { - wxPaintDC dc( this ); - dc.DrawBitmap( m_bitmap, 0, 0, true /* use mask */ ); + wxPaintDC dc(this); + + if (m_pClearBgMenu->IsChecked()) + ClearBackground(); + + const wxSize size = GetClientSize(); + dc.DrawBitmap(m_bitmap, + (size.x - m_bitmap.GetWidth())/2, + (size.y - m_bitmap.GetHeight())/2, + true /* use mask */); } - void OnSave(wxMouseEvent& WXUNUSED(event)) + void OnSave(wxCommandEvent& WXUNUSED(event)) { #if wxUSE_FILEDLG wxImage image = m_bitmap.ConvertToImage(); @@ -284,8 +336,48 @@ public: #endif // wxUSE_FILEDLG } + void OnResize(wxCommandEvent& WXUNUSED(event)) + { + wxImage img(m_bitmap.ConvertToImage()); + + const wxSize size = GetClientSize(); + img.Rescale(size.x, size.y, wxIMAGE_QUALITY_HIGH); + m_bitmap = wxBitmap(img); + + UpdateStatusBar(); + Refresh(); + } + + void OnRotate(wxCommandEvent& event) + { + double angle = 5; + if ( event.GetId() == ID_ROTATE_LEFT ) + angle = -angle; + + wxImage img(m_bitmap.ConvertToImage()); + img = img.Rotate(angle, wxPoint(img.GetWidth() / 2, img.GetHeight() / 2)); + if ( !img.Ok() ) + { + wxLogWarning(_T("Rotation failed")); + return; + } + + m_bitmap = wxBitmap(img); + + UpdateStatusBar(); + Refresh(); + } + private: + void UpdateStatusBar() + { + wxLogStatus(this, _T("Image size: (%d, %d)"), + m_bitmap.GetWidth(), + m_bitmap.GetHeight()); + } + wxBitmap m_bitmap; + wxMenuItem* m_pClearBgMenu; DECLARE_EVENT_TABLE() }; @@ -326,7 +418,6 @@ public: wxLogError(_T("Failed to gain raw access to bitmap data")); return; } - data.UseAlpha(); wxAlphaPixelData::Iterator p(data); for ( int y = 0; y < SIZE; ++y ) { @@ -350,7 +441,6 @@ public: return; } - data.UseAlpha(); wxAlphaPixelData::Iterator p(data); for ( int y = 0; y < REAL_SIZE; ++y ) @@ -448,7 +538,10 @@ IMPLEMENT_APP(MyApp) BEGIN_EVENT_TABLE(MyImageFrame, wxFrame) EVT_ERASE_BACKGROUND(MyImageFrame::OnEraseBackground) EVT_PAINT(MyImageFrame::OnPaint) - EVT_LEFT_DCLICK(MyImageFrame::OnSave) + + EVT_MENU(wxID_SAVE, MyImageFrame::OnSave) + EVT_MENU_RANGE(ID_ROTATE_LEFT, ID_ROTATE_RIGHT, MyImageFrame::OnRotate) + EVT_MENU(ID_RESIZE, MyImageFrame::OnResize) END_EVENT_TABLE() #ifdef wxHAVE_RAW_BITMAP @@ -1029,17 +1122,21 @@ enum ID_QUIT = wxID_EXIT, ID_ABOUT = wxID_ABOUT, ID_NEW = 100, - ID_SHOWRAW = 101 + ID_INFO, + ID_SHOWRAW, + ID_SHOWTHUMBNAIL }; IMPLEMENT_DYNAMIC_CLASS( MyFrame, wxFrame ) -BEGIN_EVENT_TABLE(MyFrame,wxFrame) +BEGIN_EVENT_TABLE(MyFrame, wxFrame) EVT_MENU (ID_ABOUT, MyFrame::OnAbout) EVT_MENU (ID_QUIT, MyFrame::OnQuit) - EVT_MENU (ID_NEW, MyFrame::OnNewFrame) + EVT_MENU (ID_NEW, MyFrame::OnNewFrame) + EVT_MENU (ID_INFO, MyFrame::OnImageInfo) + EVT_MENU (ID_SHOWTHUMBNAIL, MyFrame::OnThumbnail) #ifdef wxHAVE_RAW_BITMAP - EVT_MENU (ID_SHOWRAW, MyFrame::OnTestRawBitmap) + EVT_MENU (ID_SHOWRAW, MyFrame::OnTestRawBitmap) #endif #if wxUSE_CLIPBOARD @@ -1056,11 +1153,15 @@ MyFrame::MyFrame() wxMenu *menuImage = new wxMenu; menuImage->Append( ID_NEW, _T("&Show any image...\tCtrl-O")); - + menuImage->Append( ID_INFO, _T("Show image &information...\tCtrl-I")); #ifdef wxHAVE_RAW_BITMAP + menuImage->AppendSeparator(); menuImage->Append( ID_SHOWRAW, _T("Test &raw bitmap...\tCtrl-R")); #endif menuImage->AppendSeparator(); + menuImage->Append( ID_SHOWTHUMBNAIL, _T("Test &thumbnail...\tCtrl-T"), + "Test scaling the image during load (try with JPEG)"); + menuImage->AppendSeparator(); menuImage->Append( ID_ABOUT, _T("&About...")); menuImage->AppendSeparator(); menuImage->Append( ID_QUIT, _T("E&xit\tCtrl-Q")); @@ -1099,23 +1200,71 @@ void MyFrame::OnAbout( wxCommandEvent &WXUNUSED(event) ) _T("About wxImage Demo"), wxICON_INFORMATION | wxOK ); } -void MyFrame::OnNewFrame( wxCommandEvent &WXUNUSED(event) ) +wxString MyFrame::LoadUserImage(wxImage& image) { + wxString filename; + #if wxUSE_FILEDLG - wxString filename = wxFileSelector(_T("Select image file")); - if ( !filename ) - return; + filename = wxFileSelector(_T("Select image file")); + if ( !filename.empty() ) + { + if ( !image.LoadFile(filename) ) + { + wxLogError(_T("Couldn't load image from '%s'."), filename.c_str()); + + return wxEmptyString; + } + } +#endif // wxUSE_FILEDLG + return filename; +} + +void MyFrame::OnNewFrame( wxCommandEvent &WXUNUSED(event) ) +{ wxImage image; - if ( !image.LoadFile(filename) ) + wxString filename = LoadUserImage(image); + if ( !filename.empty() ) + (new MyImageFrame(this, filename, wxBitmap(image)))->Show(); +} + +void MyFrame::OnImageInfo( wxCommandEvent &WXUNUSED(event) ) +{ + wxImage image; + if ( !LoadUserImage(image).empty() ) { - wxLogError(_T("Couldn't load image from '%s'."), filename.c_str()); + // TODO: show more information about the file + wxString info = wxString::Format("Image size: %dx%d", + image.GetWidth(), + image.GetHeight()); + + int xres = image.GetOptionInt(wxIMAGE_OPTION_RESOLUTIONX), + yres = image.GetOptionInt(wxIMAGE_OPTION_RESOLUTIONY); + if ( xres || yres ) + { + info += wxString::Format("\nResolution: %dx%d", xres, yres); + switch ( image.GetOptionInt(wxIMAGE_OPTION_RESOLUTIONUNIT) ) + { + default: + wxFAIL_MSG( "unknown image resolution units" ); + // fall through - return; - } + case wxIMAGE_RESOLUTION_NONE: + info += " in default units"; + break; - (new MyImageFrame(this, wxBitmap(image)))->Show(); -#endif // wxUSE_FILEDLG + case wxIMAGE_RESOLUTION_INCHES: + info += " in"; + break; + + case wxIMAGE_RESOLUTION_CM: + info += " cm"; + break; + } + } + + wxLogMessage("%s", info); + } } #ifdef wxHAVE_RAW_BITMAP @@ -1155,7 +1304,7 @@ void MyFrame::OnPaste(wxCommandEvent& WXUNUSED(event)) } else { - (new MyImageFrame(this, dobjBmp.GetBitmap()))->Show(); + (new MyImageFrame(this, _T("Clipboard"), dobjBmp.GetBitmap()))->Show(); } wxTheClipboard->Close(); } @@ -1178,3 +1327,37 @@ bool MyApp::OnInit() return true; } + +void MyFrame::OnThumbnail( wxCommandEvent &WXUNUSED(event) ) +{ +#if wxUSE_FILEDLG + wxString filename = wxFileSelector(_T("Select image file")); + if ( filename.empty() ) + return; + + static const int THUMBNAIL_WIDTH = 320; + static const int THUMBNAIL_HEIGHT = 240; + + wxImage image; + image.SetOption(wxIMAGE_OPTION_MAX_WIDTH, THUMBNAIL_WIDTH); + image.SetOption(wxIMAGE_OPTION_MAX_HEIGHT, THUMBNAIL_HEIGHT); + + wxStopWatch sw; + if ( !image.LoadFile(filename) ) + { + wxLogError(_T("Couldn't load image from '%s'."), filename.c_str()); + return; + } + + const long loadTime = sw.Time(); + + MyImageFrame * const + frame = new MyImageFrame(this, filename, wxBitmap(image)); + frame->Show(); + wxLogStatus(frame, "Loaded \"%s\" in %ldms", filename, loadTime); +#else + wxLogError( _T("Couldn't create file selector dialog") ); + return; +#endif // wxUSE_FILEDLG +} +